What scanner is best for my vehicle?

Being that's a 2000 you have a few options depending on what other vehicles you have and want to work on. I would look at a used Genesys from OTC, those were updated to around 2010 or so but they cover a lot of vehicles. They are a real scan tool and not just a code reader. They will do everything on that truck that the OE Tech 2 can do. Now if you want to go newer and have a tool to work with current year stuff as well then look at one of the Launch products like the Diagun V or the 431 V Pro, those are both true scan tools with bidirectional ability and much more.